Pile driver



Sept. 17, 1929. R w, CRIST 1,728,665

FILE IDRIVER Filed May 28, 1925 2 Sheets-Sheet 1 fnverzi u %@M%M. W5

Patented Sept. 17, 1929 UNITED STATES PATENT OFFICE ROBERT W. GRIST, OF BEDFORD, OHIO, ASSIGNOB, BY MESNE ASSIGNMENTS, TO THE MIDLAND ENGINEERING COMPANY, A- CORPORATION OF OHIO PILE DRIVER Application filed May 28,

This invention relates to pile drivers and has for its object to provide improved supporting means for the leader vvhich will permit long leaders to be readily collapsed from upright operative position onto the supporting boom for transportation.

Referring to the accompanying drawmgs and the following description, the invention may be said to comprise the device herein shown and described, together with such variations and modifications as will be apparent to those skilled in the art to which the invention appertains.

Reference should be had to the accompanying drawings in which Fig. 1 shows the pile driver in side elevation, the leader being shown in full lines in upright operative position and in dotted lines collapsed upon the boom for transportation; Fig. 2 is a side elevation showing a modified form of support for the leader; Fig. 3 is a detail view showing a modified form of leader adjusting device; and Fig. 4 is an end elevational view taken from the right of Fig. 1, with the leader re moved.

Referring to the accompanying drawings, the pile driver is shown supported upon a suitable carrier or vehicle such as the railway car 1 upon which is mounted a turntable 20f the locomotive crane type. Mounted upon the turntable 2 there is asuitable operators cab and machinery housing 3. Supported upon the turntable and projecting outwardly therefrom there is a leader supporting boom formed of telescopic sections, the inner section 4 being in the form of a truss and the outer section 5 being in the form of a beam slidably mounted in the top portion of the truss 4. The beam 5 may be adjusted outwardly from a position in which its outer end is adjacent the outer end of the truss 4 to lengthen the boom for a purpose which will be hereinafter described. The slidable beam 5 is adjusted inwardly and outwardly by means of a chain or rope 6 which is attached to the beam 5 at the point 7 and runs over sprockets 8 and 9 adjacent the inner and outer ends of the truss 4, as well as over an intermediate sheave 40. A hand crank 10 is provided for rotating the inner sprocket 8 to 1925. Serial No. 33,374.

shift the beam 5, the shaft of the crank 10 being connected to the shaft of the sprocket 8 through intermeshing gears 11 and 12. The truss 4 is supported in substantially horizontal position from the turntable 2, the bottom of the truss being connected to a bracket 13 secured to the turntable and the top of the truss being connected by a tension rod 14 extending therefrom to a fixed support adjacent the top of the cab 3. A leader 15 is pivoted near its lower end t the outer end of the beam 5, being supported upon a horizontal pivot pin 16. Beneath the pivot, the leader 15 has attached to the inner side thereof channel abutment bars 17 which,

when the leader is in upright position abut against the vertical forward end 18 of the truss which serves as an abutment to limit the movement of the leader about its ivot, the channel abutment bars 17 being adapted to receive suitable, retention devices carried by the forward end of the truss 4 to lock the leader in upright position. A hoist rope 19 extends from a suitable drum within the housing 3 beneath guide sheaves 20 and 21 carried by the truss 4 and upwardly over a guide sheave 22 at the top of the leader, the hoist rope serving to elevate the weight within the leader. A cable 23 extends from a suitable drum within the cab 3 and is attached to the leader 15 adjacent the upper end thereof, the

cable 23 serving to pullv the leader inwardly about its pivot 16 whenthe weight is at the lower end thereof, the leader being collapsible to a position along thetop of the boom and substantially parallel therewith. Before the leader is collapsedupon the boom or while the leader is being collapsed upon the boom, the beam 5 will be adjusted outwardly to lengthen the boom and to shift the pivot 16 of the leader outwardly from the vehicle frame. By extending the boom the leader may be supported in horizontal position with substantially the entire length of the leader resting upon the boom, the adjustment of the beam 5 being made sufli'cient to accommodate the particular leader employed. The beam 5 consists preferably of two side bars 41,which may be of I-beam section, and suitable cross braces including the pivot pin 16 above mentioned. This beam is slidably arranged between a pair of rollers 42 supported in the upper rails of the truss 4 and two pairs of rollers 42 and 44 mounted in gusset plates on the ssla etu ti ng ale de v o p i ht position th'e pile driver Wei ht-iilfay bepiilled by means of a cable 24 exten mgfidm a drum within the cab 3 and over guide sheaves on e -ke l tatt eter; d i tth le der that ht-t re f. wi l eeunteltba aee the portion ofthe leader upon the inner side of the pivot 16. When so counterbalancedt'he leader may be brought to uprightposition by payingout the cable 23. Whenever desirable on account oi the excessive length of the lead,- eli i h iu1er ar-may be eih lbyed t'o suppbrt thx prejecuagend ercueleadrauaboom;

ig.- 2 be the arming shew-s a mediate cease mti'ell it amen the-reader 15 isslid' ably inounted open elongateagui demember 30 am ea wthe leauer 15h whichsl id'es in apivb'te'd guide iv 'supp orta a a herizbhtai shaft 31 "at the oiijte'r end ar "the rat-01a a.

The guide member 17 and u eieaa'i- 1 5 and 36) carried thereby are rhovablefrom an uprightpositi'onjin which the guide membe n abuts ag-ma redeem-a end er are boom e'toa eell'a-p ible pose ii-white the guide member and lame 11' rig-the tsp of the teem a. I suitabiegmeans is'provided for "adjhsting leader lb ongitudina -y of the guide-member 17*9 'A's shownh erein, a pinien 3 mounted e the than 1 aha-meshes wane 'rack team ng aieng the inner "side ert eyguidemaabet ee- P p The t me Barne s-e1uriven tyany-suitable meanm d as shown herein, 'is'tiriven by meats er a {sprocket chain eatxeeading from a' 'sui table unveil epreeka ,34; m unte ea anathema to a 'epreekete ruieyshaa 3 1; By meaes aural-e anapiarehiuiei eada 15 are" ea {adjusted at "difl'erent heights with re's at: to meter 1.; With the 'adjustable leader 15% is unnecessary to provide the ex; feasible new 4 ror'e teraung 'theleader in eqliapsitie eeaieas ace the "leader 15 can be adjusted in the guide 17% same as much o the leader aesireaeeyoad the end (if tneb'dom; H a I nmate, er t e ra'ckianditlriving inion for adjusting the' posi tioh tr are letter 15 in the g iaemembers 17-,there maybe, eese cure sleek aadeaelgieer'raegemeae jindiame "a Fig.-

iawhich the sheav blocks '35. and 3e are treated as the i'ader 715 tea guideymember 17 'cable'37' being reeved t rough the eroeke by means of whieh the leader may be aieed' or iewrea; av ng described my invent on; I claim 1, {A pile driver 'o'ompri'sing a vehicle, extens biegedom earned by the er the vehid'afsaid been emprisia' inner truss end of the beam, and means at the outer end of the truss member forming an abutment against which the leader engages when in up-' wardly from a position in which its outer an i adiee n h o te ende t t ues pi' vi e a e o g d. uppertfio the leader when the same is collapsed for transporta- .ttionr 2. A ile driver comprising a vehicle an extensible-boom "carried by the frame of the vehicle and extending outwardly therefrom,

sai'd b'ooiiib omprisihg inner truss member and madame beam exten in longitudinally ofthe" trussiheniberadjacent the upper side thereof, the saidtruss member having an outer end portion forminganabutment below said beam, and a-l'eader s'upp'orted by ahoriz'oiital pivot upon the outer end o'fsaid beam and adapted when in vu jiight o'perativeposition "t6 engage with the abutment at the outer end of theti'u ssfsaid leader being collapsible froin'its upright operative'position to a position along the top of the be'orh; and said beam being adjustable outwardly to previl e melon-gamesuppbigt for the leader when the same is "collapsed for transportation;

"A pile "driver comprising a vehicle, a turntable on the vehicle; anoutwardly extendmg were carried by the turntable, h leader pi'bted near its lower, end to the "outer end or saidtoem, andan abutment on tlife'booi'n belovv the pivotal "conn tion oi-f th leader therewith with which the leader engages when in'upright position said leader being collapsible from its upright'op'erative position to a position along the top of the boom and said boom being extensible to pro ide an elongated support for, the leader when the same i collapsed forwans ortation.

In testimon wheatar; I hereunto affixsignature; r i ROBERT w. on sr. I

member, and "a sli'dhble beau-1 extending lengthwise -15 the truss aajae te the up er srdetuerea-arem-er 'pivotea wthe enter a fee ieo 

